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Two-rail steel-backed timber guardrail system : Crown Point Highway, Multnomah County, Oregon : construction report.
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1992-09-01
[PDF-615.39 KB]
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Abstract:Guardrails in Oregon have traditionally been constructed using a steel W-beam guardrail. Although the steel guardrail has functioned well in the past, it is not aesthetically pleasing. To achieve a more pleasant drive through parks and scenic highways, the Oregon Department of Transportation (ODOT) decided to install a timber guardrail. The Federal Highway Administration (FHWA) has approved the use of a two-rail steel-backed timber guardrail, that was tested by the Texas Transportation Institute, for use on federally funded projects. The tests were accordance with the National Cooperative Highway Research Program (NCHRP) Report 230. The two-rail steel-backed timber guardrail provides an alternative to the standard guardrail used in Oregon.
The objective of this project is to implement an in-service evaluation for the two-rail steel-backed timber guardrail installed on Crown Point Highway (Highway 125) in Multnomah County, between mile posts 10.23 and 11.05. The evaluation will include monitoring the construction process, construction costs, maintenance costs and performance of the guardrail for a two year period. This report will cover the construction process and construction costs.
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